Ensure your Line (L1) and Load (T1) connections are torqued to specification. Loose terminals are the #1 cause of localized overheating. If the plastic casing near the terminals looks discolored, high contact resistance is your culprit. 2. Why is your GMR32B running hot?
Resistive (heaters) or Inductive (transformers/motors). gmr32b phase controller manual hot
Dust buildup on the heatsink is a silent killer. Ensure your Line (L1) and Load (T1) connections
Install a cooling fan or ensure the heatsink fins are oriented vertically to allow for natural convection. C. Harmonic Noise and Overloading gmr32b phase controller manual hot
Often indicates an Over-Temperature Protection (OTP) trip. The unit will cease output until the internal thermistor cools down.
Check the manual for specific pulse patterns, as these often point to "Phase Loss" or "Load Open." 4. Maintenance Checklist
